1-8
Revised 8-6-93
k. Pressure Relief Valves
Low Side:
Opens: 18.63 kg/cm
@
(265 psig)
High Side for R-12:
Opens: 24 kg/cm
@
(340 psig)
High Side with provision for R-22:
Opens: 34.10 kg/cm
@
(485 psig)
High Side on model 69NT40-441-25:
Opens: 35.15 kg/cm
@
(500 psig)
m. Unit Weight
Refer to Table 1-1.
n. Water Pressure Switch (Optional)
Cut-In: 0.5
¦
0.2 kg/cm
@
(7
¦
3 psig)
Cutout: 1.6
¦
0.4 kg/cm
@
(22
¦
5 psig)
1.4 ELECTRICAL DATA
a. Circuit Breaker
CB-1 Trips at: 29 Amps (Model 69NT40)
CB-1 Trips at: 24.2 Amps (Model 69NT20)
CB-2 Trips at: 50 Amps
b. Compressor Motor
Full Load Amps (FLA): 17.6 Amps @ 460 vac
(with current limiting set at 21 amps)
(Model 69NT40)
c. Condenser Fan Motor
Bearing Lubrication: Factory lubricated, additional
grease not required.
Full Load Amps: 2.0/4.0 FLA
Nominal Horsepower: 0.43/0.75 hp
Rotation: CCW when viewed from shaft end.
Speed: 1425/1725
Voltage: 190/380/208/230/460 vac/1ph/50/60 hz
d. Drain Pan Heaters
Number of Heaters: 1
Rating: 750 watts +5 /---10 % at 460 Vac
Resistance (cold): 22.7
¦
5% ohms nominal
Type: Sheath
e. Evaporator Coil Heaters
Number of Heaters: 4
Rating: 750 watts each at 230 +5/---10 volts
Resistance (cold): @ 68
_
F (20
_
C)
Ambient: 66.8 to 77.2 ohms
Type: Sheath
f. Evaporator Fan Motor(s)
Bearing Lubrication: Factory lubricated, additional
grease not required
Full Load Amps
High Speed: 2.0/2.3 Amps
Low Speed: 0.4/0.6 Amps
Single Speed Motor: 2.0/4.0 Amps
Nominal Horsepower
High Speed : 0.58/1 hp
Low Speed : 0.07/0.12 hp
Single Speed Motor : 0.58/1.0 hp
Rotation
Evap. Fan Motor #1 (See Figure 1-2):
CW when viewed from shaft end
CCW when viewed from end opposite shaft end
Evap. Fan Motor #2 (See Figure 1-2):
CCW when viewed from shaft end
CW when viewed from end opposite shaft end
Speed: 2850/3450 rpm
Voltage: 380/460 vac/1 ph/50/60 hz
g. Fuses
Control Circuit:
6 Amps (F)
Microprocessor:
5 Amps (Slow Blow) (F3A)
Battery Charger:
5 Amps (Slow Blow) (F3B)
1.5 VOLTAGE SWITCH AND POWER
TRANSFORMER (OPTIONAL)
WARNING
Do not attempt to remove power plug(s) before
turning OFF start-stop switch (ST), unit circuit
breaker(s) and external power source.
Make sure the power plugs are clean and dry
before connecting to any power receptacle.
a. Step-Up Power Transformer
The transformer is located under the condenser coil
(left-hand side of unit) and the purpose of this
transformer is to provide 380 vac/3 ph/50 hz power when
the 190/230 vac power cable (black) is connected to a 190
vac power supply or to provide 460 vac/3 ph/60 hz when
the 190/230 vac power cable (black) is connected to a 230
vac power supply.
WARNING
Do not attempt to remove power plug before
turning OFF voltage switch (VS), start-stop
switch (ST), unit circuit breakers (CB-1 And
CB-2), and external power source.
b. To Place Unit on 190/230 vac Power Supply
1. Make sure voltage switch (VS) is in the OFF
position. Make sure start-stop switch (ST, on control
panel) and circuit breakers CB-2 is in position “0”
(OFF). (See Figure 1-4.)
2. Connect 190/230 vac power cable plug (black
cable). Place voltage switch (VS) in the 230 v position.
Place circuit breaker (CB-2) in position “1”. Close and
secure control box door and then place the start-stop
switch (ST) in position “1”.
c. To Place Unit on 380/460 vac Power Supply
1. Make sure voltage switch (VS) is in the OFF
position. Make sure start-stop switch (ST, on control
panel) and circuit breaker (CB-1) is in position “0”.
(OFF).
2. Connect 380/460 vac power cable plug (yellow
cable). Place voltage switch (VS) in the 460 v position.
Place circuit breaker (CB-1) in position “1”. Close and
secure control box door and then place the start-stop
switch (ST) in position “1”.
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